water-meter

Forewords

This project aims at getting an analog signal from a water meter and use it for a house automatization system to control the water consumption.

Specifications

This project uses :

• CNY70 reflective sensor (that includes an infrared emitter and phototransistor)
• Arduino Pro Micro 3.3v
• Solar Panel
• TP4056 (Lithium Battery Charger Module)
• E45-TTL-100 (Wireless transceiver module with LoRa spread-spectrum technology)

Datasheet

• Schema

Available here : https://easyeda.com/fguiet/water-meter

Sensor accuracy

Timestamp	Raw water meter value	Total liters consumed (from sensor)	Real water comsumption	Sensor water consumption
2020/01/26 @ 15h10	2064 996	0	0	0
2020/01/26 @ 17h23	2065 045	50	49	50
2020/01/26 @ 19h59	2065 279	283	234	233
2020/01/27 @ 17h48	2065 488	493	209	210

3D CNY70 Holder

I have designed a 3D CNY70 holder that fits on my watermeter.

In real life

• CNY70 Sensor + custom 3D printed holder on water meter

• Arduino + LoRa transceiver